Unfortunately,whenIdroppedin,ProfessorSmith   ,soweonly...

问题详情：

Unfortunately, when I dropped in, Professor Smith    , so we only had time for a few words.

A．has just left                        B．had just left

C．just left                            D．was just leaving

【回答】

D

【解析】

句意：不幸的是，当我进去的时候，史密斯教授正要走，所以我们只有几句话的时间。考查时态辨析题。so所以，表结果；根据so we only had time for a few words.，可知当我们去拜访时，Professor Smith“正要”离开，需用过去将来时，可排除ABC三项。was just leaving是过去进行时表示过去将来意义，故选D。

知识点：动词时态

题型：选择题